code: def forward(self, input):
      return (input * self.a) * self.b
  
file_path: apex/tests/distributed/DDP/ddp_race_condition_test.py
imports: import torch
  import torch.distributed
  from torch.nn import Parameter
  from torch.nn import Module
  from apex.parallel import DistributedDataParallel
  import argparse
  import os
label_desc: Use image node_id 2 for calling the Model obj's underlying member method code with example usage: obj.forward(input) and returns: unknown